Bull thistle plant, probably in Olympic National Park, date unknown

Chicago citation style
Unknown. Bull thistle plant, probably in Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/2024. (Accessed November 14, 2018.)
APA citation style
Unknown, Bull thistle plant, probably in Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/2024
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/2024>.
Note: These citations are programmatically generated and may be incomplete.